Raised printing apparatus



y 15, 1952 R. F. BERNDT I 2,603,180

RAISED PRINTING APPARATUS Filed Feb. 25, 1946 I 4 R v WM R RichardEBerndi may Patented July 15, 1 952 Richard "F, Bernie, Racine, Wis.,assignor to Virk'otype Corporation, -a corporation 'of Vir- ApplicationFebr uary 25, 1946, seamin 649,519 s Claims. (cram-4e) 1 I Thisinvention pertains broadly'to raised print 'ing in which awet'impression is first made upon a sheet of material to serve as a bondfor "a powdered compound subsequently applied to'the sheet to provideraised printing simulating embossin'g. M

Heretofore the above process has been applied to individual sheets ofpaper, and requires'a considerable period of time in the drying process,which necessarily restricts production.

The present invention has primarily for its object to increasep-rod'uctionin raised printing by the provision of a novel apparatusdesigned to print'a web of paper traveling at'a relatively high rate ofspeed as compared to the printing of individual sheets, and effectivelydry the same to permit immediate rewinding. I

Incidental to the foregoing, a more specific object of the invention isto providean apparatus for applying heat to the printed web to melt thepowdered materialretained by the Wet impression "on the web, andthereafterjsubjecting the web 'to cooling means for congealing the fusedmaterial.

A further object of the invention is to pass 'the printed web over aheated cylinder to effect melting of the powdered compound and anintimate bondwith the ink'or wet impression.

In combination with the foregoing, another object is to apply exteriorheat to the printed surface of the web to supplement the heated cylinderin instances where a maximum amount of heat is required to effect thedesired results.

Another object is to provide a chilled cylinder over which the web istrained to congeal both thewet'impression and melted powdered compoundafter leaving the heating apparatus.

A still further object is to provide auxiliary means when required todirect a forced blast of air against either one or both surfaces of theweb after leaving the chilled cylinder.

In addition to the foregoing, other objects will appear'as thedescriptionproceeds, and while the accompanying drawing illustrates onecomplete example of the physical embodiment of themvention, constructedin accordance with the best mode so far devised, it isto be understoodthat changes in the preciseembodiment of the invention are contemplatedwithin the scope of the appended claims.

In the drawing:

The sole figure is' a schematic view of an apparatus applicable to aconventional raised printing press, and incorporating principles of thepresent invention.

Referring nowmore particularly'to the accompanying drawing, theapparatus disclosedis designed for raised printing on a web ofpaper'desi nated as P. The web P is first passed through a printing orwet impression cylinder l co-operating with a platen cylinder 2 toimprint ink or solvent upon the web.

'From the wet impression mechanism, which,

is conventional, the web I? travels below a powder dispensing'andcleaning device 3. 'In'the present illustration the dispensing "device 3includes a distributor 4 positioned-transversely of the web, to dust ordeliver'measured quantities of powdered compound upon the top or printedsurface of the web. To remove surpl s powder not adhered to the ink, asuction headl'ris'p'ositioned .over and transversely of the web, behindthe distributor, the head being connected with a centrifugal separator'6, mounted on the top'of the distributor l, by a nozzle 1. A'suctionexhaust line 8 serves to draw on air-floating dust from the separator S,and permit return of the heavier particles of powdered compound to thedismelt the powdered dusting compound adhering to the wet impression, toefiect a complete bond between the two. In the event that the dustingmaterial is of such character as to require a high melting temperature,or' should it be desired *to operate themachine at a high rate ofspeed-"to increase its capacity, auxiliary heat maybe'applied to theprinted surface of the sheet-'as it travels over the heated cylinder 16,by eithera hot air, electrical, or other equivalent type "of heater ll,surroundinga portion ofthe cylinder I0.

I TheWeb'P, after leaving thecylinder*lfl,-'is trained over a chilledcyldnier l2, the'eifeet 15f which is to congeal boththe 'wet'impressio'nand powdered compound. Under ordinary circumstances, utilizing a fastdrying ink and a powdered compound that requires-a comparatively lowdegree of heat to melt, the roller [2 is sufiicient to both congeal anddry the printing.

On the other hand, should it be necessary to subject the web to extremeheat, and it is found that the chilled cylinder 12 is insufficient toeffeet the desired congealing and drying of the ID and the chilledcylinder 12, as indicated in' dotted lines on the drawing.

Also in place of an air blast, the web P, after leaving the chilledcylinder 12, may be trained over a circuitous route on guide rollers,and subjected to either normal atmosphere or conditioned air. 1

From the foregoing explanation considered'in connection with theaccompanying drawing, it will be apparent that an extremely simple andcompact apparatus has been provided for raised printing on a web ofpaper, and which insures maximum capacity in that it eliminates thepresest tedious and slow process required in printing individual sheets.

While the present apparatus has been illustrated and described inconnection with conventional mechanisms for printing and dusting theweb, it is to be understood that other devices may be embodied, inasmuchas the salient feature of the invention resides in the treatment of theweb subsequent to printing and dusting.

' Specifically, the powder dispensing and removal device 3 is' novel andis included in a subsequent application, Serial No. 742,759. filed April19, 1947, entitled Powder Separator and Dispenser, now Patent No.2,591,043.

I claim:

1. An apparatus for raised printing on a traveling web of materialcomprising, means for printing a wet impression upon the web, amechanism for distributing a powdered compound upon the printed surfaceof the web, suction means for removing excess powder not adhered to theprinted impression, means on the opposite side of the web from thesuction means for maintaining the web adjacent the suction means undertension, means for applying heat to the web to melt the powderedcompound and provide an intimate bond between the powder and wetimpression, and means for chilling the web to congeal the powderedcompound.

2. An apparatus for raised printing ona traveling web of materialcomprising, meansfor printing a wet impression upon the web, a mechanismfor distributing a powdered compound upon the printed surface of the weband removing excess powder not adhered to the printed impression, meansfor applying heat to the web to melt the powdered compound and providean intimate bond between the powder and wet impression comprising aheated cylinder over which and in contact with which the web passesafter leaving the powder distributing mechanism, a chilled cylinder overwhich and in contact with which the web travels after leaving the heatedcylinder to congeal the powdered compound, said web passing over saidcylinders with its surface opposite that carrying the printed impressioncontacting the surface of said cylinders, and means for directing an airblast against the web for additional cooling and drying.

3. An apparatus for raised printing on a traveling web of materialcomprising, means for printing a wet impression upon the web, amechanism for distributing a powdered compound upon the printed surfaceof the web and removing excess powder not adhered to the printedimpression, means for applying heat to the web to melt the powderedcompound and provide an intimate bond between the powder and wetimpression comprising a heated cylinder over which and in contact withwhich the web passes after leavingthe powder distributing mechanism,said web passing over the heated cylinder with its surface opposite thatcarrying the printed impression contacting the surface of said cylinder,and means for chilling the web to cool the powdered compound after theweb leaves the heated cylinder.

4; An apparatus for raised printing on a traveling web of mamrialcomprising, means for printing a wet impression upon the web, amechanism for distributing a powdered compound upon the printed surfaceof the web and removing excess powder not adhered to the printedimpression, means for applying heat to the web to melt-the powderedcompound and provide an intimate bond between the powder and wetimpression comprising a heated cylinder over which and in contact withwhich the web passes after leaving the powder distributing mechanism,and a chilled cylinder over which and in contact with which the webtravels after leaving the heated cylinder to congeal the powderedcompound, said web passing over both of said cylinders with its surfaceopposite that carrying the printed impression contacting the surfaces ofsaid cylinders.

5. An apparatus for raised printing on a traveling web of materialcomprising, means for printing a wet impression upon the web, amechanism for distributing a powdered compound upon the printed surfaceof the web and removing excess powder not adhered to the printedimpression, means for applying heat to the web to melt the powderedcompound and provide an intimate bond between the powder and wetimpression comprising a heated cylinder over which and in contact withwhich the web passes after leaving the powder distributing mechanism,and means for chilling the web to cool the powdered compound after theweb leaves the heated cylinder, said web being supported solely upon itssurface opposite that carrying the printed impression from the placewhere it leaves the printing means to the place where it leaves thechilling means.

RICHARD F. BERNDT.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,149,455 Lipsius Aug. 10, 19151,283,155 Goldhamer Oct. 29, 1918 1,739,492 Berndt et al. Dec. 17, 19291,772,844 Ross Aug. 12, 1930 2,277,426 Wolf et al Mar. 24, 1942

